release-haskell: drop packages that are broken in HP 2013.2.0.0

The following packages don't compile with recent versions of GHC and
seem unmaintained, too: distributedProcess, Ebnf2ps, epic, HFuse,
Hipmunk, hspread, ltk, multiset, strictConcurrency, vacuumCairo, wxcore,
wx, wxdirect.